Question

18. In each of the following, a force, F is acting on an
object of mass, m. The direction of displacement
is from west to east shown by the longer arrow.
Observe the diagrams carefully and state whether
the work done by the force is negative, positive
or zero.
West
► East​

Answer 1

Answer:

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Explanation:

Case-1

Here,the direction of the force acting on the block is perpendicular to the displacement.So, the work done by the force is 0.

Case-2

Here,the direction of the force acting on the block is in the direction of the displacement.So, the work done by the force will be positive.

Case-3

Here,the direction of the force acting on the block is opposite to the direction of the displacement.So, the work done by the force will be negative.